XieJiann commented on code in PR #23271:
URL: https://github.com/apache/doris/pull/23271#discussion_r1309575491
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/analysis/SubqueryToApply.java:
##########
@@ -116,36 +112,44 @@ public List<Rule> buildRules() {
return new LogicalFilter<>(conjuncts, applyPlan);
})
),
- RuleType.PROJECT_SUBQUERY_TO_APPLY.build(
- logicalProject().thenApply(ctx -> {
- LogicalProject<Plan> project = ctx.root;
- Set<SubqueryExpr> subqueryExprs = new LinkedHashSet<>();
- project.getProjects().stream()
- .filter(Alias.class::isInstance)
- .map(Alias.class::cast)
- .filter(alias -> alias.child() instanceof CaseWhen)
- .forEach(alias -> alias.child().children().stream()
- .forEach(e ->
-
subqueryExprs.addAll(e.collect(SubqueryExpr.class::isInstance))));
- if (subqueryExprs.isEmpty()) {
- return project;
- }
-
- SubqueryContext context = new
SubqueryContext(subqueryExprs);
- return new LogicalProject(project.getProjects().stream()
- .map(p -> p.withChildren(
- new ReplaceSubquery(ctx.statementContext, true)
- .replace(p, context)))
- .collect(ImmutableList.toImmutableList()),
- subqueryToApply(
-
subqueryExprs.stream().collect(ImmutableList.toImmutableList()),
- (LogicalPlan) project.child(),
- context.getSubqueryToMarkJoinSlot(),
- ctx.cascadesContext,
- Optional.empty(), true
- ));
- })
- )
+
RuleType.PROJECT_SUBQUERY_TO_APPLY.build(logicalProject().thenApply(ctx -> {
+ LogicalProject<Plan> project = ctx.root;
+ ImmutableList<Set<SubqueryExpr>> subqueryExprsList =
project.getProjects().stream()
+ .map(e -> (Set<SubqueryExpr>)
e.collect(SubqueryExpr.class::isInstance))
+ .collect(ImmutableList.toImmutableList());
+ if
(subqueryExprsList.stream().flatMap(Collection::stream).count() == 0) {
+ return project;
+ }
+ List<NamedExpression> oldProjects =
ImmutableList.copyOf(project.getProjects());
Review Comment:
This copy is redundant?
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